I am dumb.

src/modules/Modules.cpp

@@ -75,7 +75,7 @@ void setupModules()
 
     new RangeTestModule();
 #elif defined(ARCH_NRF52)
-    new ExternalNotificationModule();
+    externalNotificationModule = new ExternalNotificationModule();
 #endif
 
     // NOTE! This module must be added LAST because it likes to check for replies from other modules and avoid sending extra acks